<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>黑白</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            min-width: 100vw;
            min-height: 100vh;
            background: linear-gradient(
            135deg,
            rgb(0,0,0) 0%,
            rgb(16,16,16) 6.25%,
            rgb(32,32,32) 12.5%,
            rgb(48,48,48) 18.75%,
            rgb(64,64,64) 25%,
            rgb(80,80,80) 31.25%,
            rgb(96,96,96) 37.5%,
            rgb(112,112,112) 43.75%,
            rgb(128,128,128) 50%,
            rgb(144,144,144) 56.25%,
            rgb(160,160,160) 62.5%,
            rgb(176,176,176) 68.75%,
            rgb(192,192,192) 75%,
            rgb(208,208,208) 81.75%,
            rgb(224,224,224) 87.5%,
            rgb(240,240,240) 93.75%,
            rgb(255,255,255) 100%
            )
        }
    </style>
</head>
<body>
    
</body>
</html>